85820724538 has 32 divisors (see below), whose sum is σ = 136863929664. Its totient is φ = 40220404992.

The previous prime is 85820724461. The next prime is 85820724557. The reversal of 85820724538 is 83542702858.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15581181 + ... + 15586687.

It is an arithmetic number, because the mean of its divisors is an integer number (4276997802).

Almost surely, 2^85820724538 is an apocalyptic number.

85820724538 is a deficient number, since it is larger than the sum of its proper divisors (51043205126).

85820724538 is a wasteful number, since it uses less digits than its factorization.

85820724538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7326.

The product of its (nonzero) digits is 4300800, while the sum is 52.

The spelling of 85820724538 in words is "eighty-five billion, eight hundred twenty million, seven hundred twenty-four thousand, five hundred thirty-eight".